Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.
M. M. ISLAM1, J. PODDER1,* , M. R. ISLAM1
Cadmium oxide (CdO) thin films have been deposited onto glass substrates from different molar concentration of cadmium acetate precursor solution using a simple spray pyrolysis technique. The surface morphology, structural and optical properties of the films has been characterized by Scanning Electron Microscopy (SEM) attached with an EDX, X-ray diffraction study and UV spectroscopy. From EDX data, atomic weight % of Cadmium and Oxygen are found to be 41.11% and 58.89% respectively. The SEM micrographs of as-deposited film show uniform deposition over the substrate. On annealing, the surface roughness increases and reveals sprayed particles (atoms) are adsorbed onto the glass substrate to form clusters as the primary stage of nucleation. At higher annealing temperature growing nuclei come into contact to form island stage and appears as spheroid shape. The crystal structure of the as deposited and annealed films were found to be polycrystalline with cubic structure and the lattice constant is a=4.65Å. The absorption coefficient is obtained in the order of 104 cm−1. For different molar concentrations (0.1M ~ 0.5M), the direct band gap is found to be in the range 2.40 ~2.53 eV and indirect band gap in the range 1.70~ 2.14 eV. The band gap energies depend on molar concentration of solution.
Spray pyrolysis, CdO, Molarity, Optical band gap.
M. M. ISLAM, J. PODDER, M. R. ISLAM, Effect of molar concentration on the optical and surface properties of CdO thin film deposited by spray pyrolysis, Optoelectronics and Advanced Materials - Rapid Communications, 4, 7, July 2010, pp.968-972 (2010).
Submitted at: March 1, 2010
Accepted at: July 14, 2010
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
Active accounts were imported to the new platform and assigned a random password by default. In order to access your account you need to access the login page and go through the Lost Password dialog (involves the system sending you an email with instructions) in order to reset your password. This step is necessary as passwords are kept in hashed form and the new platform uses modern hashing algorithms incompatible with the previous ones.